so I got an LED button to install into one of my machines. only problem is I don't know how to hook up the LED light. what wires to use or what I need.
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Polarity has mattered on every one I've installed.
Sorry, it has a blocking diode so you can't mess it up.
Right, but if you wire and hook several of them up before powering any of them up, you could be in for an unpleasant surprise when only 1 out of 10 are actually lit. I usually use spade connectors and crimp the receiving ends so they go onto the micro tabs nice and tight. Once they're on, they are a bitch to get back off. If you solder all connections, even more work.
Simply check the continuity with a multimeter. If there's a blocking diode, you'll have continuity with the probes connected the correct way and no continuity with them in reverse.